FIG 6.
Decreased intracellular accumulation of [3H]fluconazole among fluconazole-evolved strains. [3H]-labeled fluconazole uptake was determined in (a) fluconazole-evolved strains and (b) a CDR1 deletion strain and was compared to that shown by parental clinical isolate AR0387. FLU, fluconazole. Error bars for each data point represent standard deviations of results from six independent measurements of technical replicates. Intracellular accumulation of [3H]fluconazole was significantly lower in FLU-A, FLU-A2, FLU-B, and FLU-C than in AR0387 (P = 0.0021, P < 0.0001, P < 0.0001, and P < 0.0001, respectively), while accumulation in FLU-C2 did not significantly differ from that seen in AR0387 (P = 0.2842) and no difference in accumulation between AR0387 and AR0387_Δcdr1 was seen (P = 0.9976|).